("Flight Level Two Hundred") and it is easy to see how they could confuse that to mean 2,000'
No, it is not easy to understand for me since it one insists on this flight-level "mania" 2000 feet would be
flight level twenty, not two hundred. I can't see how you can hear
two hundred and translate it in your mind into ... twenty. Also, if they never heard 200 versus 2-0-0 (big deal!!), had slightest doubt they could have asked for clarification, actually it was their duty to do so. These pilots should be grounded and sent for some retraining.